A high-density blind hole detection device for printed circuit boards

Abstract

The present invention discloses a high-density blind hole detection device for printed circuit boards, including a work cabinet, a work bracket fixedly connected to the top of the work cabinet, an electric telescopic rod fixedly connected to the middle end of the work bracket, a fixed plate fixedly connected to the bottom of the electric telescopic rod, and movable telescopic rods fixedly connected to both ends of the bottom of the fixed plate. The present invention controls the electric telescopic rod to move downward through a PLC controller, and the electric telescopic rod moves downward while driving the fixed plate, spring, movable telescopic rod, arc-shaped rubber pressure plate and protective shell to move downward, so that the arc-shaped rubber pressure plate contacts the circuit board to be detected, and under the continuous movement of the electric telescopic rod, the fixed plate squeezes the spring, and when the spring is squeezed to produce elastic deformation, a reaction force is applied to the arc-shaped rubber pressure plate, and under this force, the arc-shaped rubber pressure plate achieves the effect of fixing the circuit board to be detected.

Description

Technical Field

[0001] The invention relates to the technical field of detection equipment, in particular to a high-density blind hole detection equipment for printed circuit boards. Background Art

[0002] In the electroplating process of printed circuit boards to be tested, the copper plating layer is mainly divided into two types. One is full-board copper plating, that is, the chemical copper plating layer is prevented from being corroded by acid after oxidation by electroplating thickening. The other is graphic electroplating, that is, the copper layer in the hole and the circuit copper layer are thickened or used as the base of the nickel plating layer. With the large-scale development of portable electronic products, "high density" has become one of the important development trends of PCB, and has directly promoted the development of micro-via technology closely related to the industry. In the laser processing processes of HDI, BGA, FPC, chip through-holes, etc. of circuit boards, due to the laser laser energy burning holes, there will be more residues that will be retained in the blind holes of the circuit board to be tested. When the monitoring instrument is used to detect the depth of the blind hole in the later stage, since the detection instrument does not have the function of cleaning the dust on the circuit board to be tested, it will have a great impact on the detection data obtained by the detection instrument, reducing the accuracy of the detection data. Summary of the invention

[0003] The purpose of the present invention is to provide a high-density blind hole detection device for printed circuit boards, which has the advantage of good dust removal effect and solves the problem that the detection instrument does not have the function of cleaning the dust on the detected circuit board, which will have a great impact on the detection data obtained by the detection instrument and reduce the accuracy of the detection data.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a high-density blind hole detection device for printed circuit boards, comprising a work cabinet, the top of the work cabinet is fixedly connected to a work bracket, the middle end of the work bracket is fixedly connected to an electric telescopic rod, the bottom of the electric telescopic rod is fixedly connected to a fixed plate, both ends of the bottom of the fixed plate are fixedly connected to movable telescopic rods, the bottom of the movable telescopic rod is fixedly connected to an arc-shaped rubber pressure plate, the top of the arc-shaped rubber pressure plate is fixedly connected to a spring, and the other side of the spring is fixedly connected to the bottom of the fixed plate, the middle end of the bottom of the fixed plate is fixedly connected to a protective shell, the middle end of the top of the inner cavity of the protective shell is fixedly installed with an infrared distance sensor, the right end of the top of the fixed plate is fixedly installed with an air pump through a bracket, and the output of the air pump The end is fixedly connected with an air duct through a pipeline, and the surface of the air duct is fixedly connected to the lower end of the surface of the infrared distance sensor, the left end of the bottom of the air duct is fixedly connected to an air gun head, the left end of the surface of the working bracket is fixedly installed with a filter box, the surface of the inner cavity of the filter box is fixedly connected with a secondary filter, a primary filter and a partition from left to right in sequence, the bottom of the filter box is fixedly connected with a blower, and the output end of the blower is fixedly connected to the upper end of the left side of the protective shell through a pipeline, the right end of the surface of the working bracket is fixedly installed with a central processing unit, and a display screen is provided on the front surface of the central processing unit, the middle end of the top of the work cabinet is fixedly connected to a limit pedestal, the top of the limit pedestal is fixedly connected with a pressure sensor, and the bottom of the pressure sensor is provided with a circuit board to be detected.

[0005] Preferably, the input end of the air pump is fixedly connected to a dust filter, and the material of the dust filter includes activated carbon.

[0006] Preferably, support blocks are fixedly connected to the four sides of the bottom of the work cabinet, and the distance between two adjacent support blocks is equal.

[0007] Preferably, one side of the front surface of the work cabinet is movably connected to a cabinet door via a hinge, and a handle is fixedly connected to the left end of the cabinet door surface.

[0008] Preferably, a PLC controller is fixedly installed on the right end of the top of the work cabinet, and control buttons are arranged on the top of the PLC controller.

[0009] Compared with the prior art, the present invention has the following beneficial effects:

[0010] 1. The present invention controls the electric telescopic rod to move downward through a PLC controller. When the electric telescopic rod moves downward, it drives the fixed plate, the spring, the movable telescopic rod, the arc-shaped rubber pressure plate and the protective shell to move downward, so that the arc-shaped rubber pressure plate contacts the circuit board to be detected. When the electric telescopic rod is continuously moved, the fixed plate squeezes the spring. When the spring is squeezed and elastically deformed, a reaction force is applied to the arc-shaped rubber pressure plate. Under this force, the arc-shaped rubber pressure plate achieves the effect of fixing the circuit board to be detected. By setting a pressure sensor, the pressure value borne by the circuit board to be detected can be detected. When the protective shell contacts the circuit board to be detected and the downward pressure generated reaches the range value preset by the pressure sensor, the pressure sensor transmits the information to the central processing unit. After receiving the information, the central processing unit transmits a signal to the PLC controller. After receiving the signal, the PLC controller controls the electric telescopic rod to stop working and controls the air pump, the blower and the infrared distance sensor to work. The air pump works with After the external airflow flows to the air gun head through the pipeline, it blows the position of the blind hole on the circuit board to be tested. Under the blowing of the wind, the residue on the surface of the blind hole is lifted up, and the air carrying the residue inside the protective shell is driven by the blower to flow to the filter box through the pipeline. Through the setting of the primary filter and the secondary filter inside the filter box, the airflow delivered by the blower can be filtered to prevent dust and residue from spreading to the outside and causing secondary pollution. The infrared distance sensor can measure the distance between the infrared distance sensor and the bottom of the blind hole, and then the infrared distance sensor uploads the data to the central processing unit. After the central processing unit analyzes the data, it uploads the information to the display screen for display. Under the overall coordination, the depth of the blind hole on the circuit board to be tested is detected and the dust removal effect is achieved, which greatly improves the accuracy of the data and solves the problem that the detection instrument does not have the function of cleaning the dust on the circuit board to be tested, which will have a great impact on the detection data obtained by the detection instrument and reduce the accuracy of the detection data. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the structure of the present invention;

[0012] Figure 2 This is a schematic diagram of the protective shell structure of the present invention;

[0013] Figure 3 This is a schematic diagram of the filter box structure of the present invention;

[0014] Figure 4 For the present invention Figure 1 A partial enlarged view of point A in the middle.

[0015] In the figure: 1. display screen; 2. central processing unit; 3. dust filter; 4. air pump; 5. electric telescopic rod; 6. protective shell; 7. filter box; 8. blower; 9. working bracket; 10. support block; 11. circuit board to be tested; 12. pressure sensor; 13. limit stand; 14. working cabinet; 15. cabinet door; 16. PLC controller; 17. arc rubber pressure plate; 18. air gun head; 19. air guide tube; 20. infrared distance sensor; 21. secondary filter; 22. primary filter; 23. partition; 24. spring; 25. movable telescopic rod; 26. fixed plate. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0017] In the description of this application document, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this patent and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this patent. In the description of this application document, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "set" should be understood in a broad sense, for example, they can be fixedly connected or set, or detachably connected or set, or connected or set in one piece. For ordinary technicians in this field, the specific meanings of the above terms in this patent can be understood according to specific circumstances.

[0018] See also Figure 1-4A high-density blind hole detection device for printed circuit boards includes a work cabinet 14, support blocks 10 are fixedly connected to the four sides of the bottom of the work cabinet 14, and the distance between two adjacent support blocks 10 is equal. A cabinet door 15 is movably connected to one side of the front surface of the work cabinet 14 through a hinge, and a handle is fixedly connected to the left end of the surface of the cabinet door 15. A PLC controller 16 is fixedly installed on the right end of the top of the work cabinet 14, and a control button is arranged on the top of the PLC controller 16. A work bracket 9 is fixedly connected to the top of the work cabinet 14, an electric telescopic rod 5 is fixedly connected to the middle end of the work bracket 9, and a fixed plate 26 is fixedly connected to the bottom of the electric telescopic rod 5. Both ends of the bottom of the fixed plate 26 are fixedly connected to movable telescopic rods 25, and the bottom of the movable telescopic rod 25 is fixedly connected to the An arc-shaped rubber pressure plate 17 is connected, a spring 24 is fixedly connected to the top of the arc-shaped rubber pressure plate 17, and the other side of the spring 24 is fixedly connected to the bottom of the fixed plate 26, a protective shell 6 is fixedly connected to the middle end of the bottom of the fixed plate 26, an infrared distance sensor 20 is fixedly installed at the middle end of the top of the inner cavity of the protective shell 6, an air pump 4 is fixedly installed at the right end of the top of the fixed plate 26 through a bracket, the input end of the air pump 4 is fixedly connected to a dust filter 3, the material of the dust filter 3 includes activated carbon, the output end of the air pump 4 is fixedly connected to an air guide tube 19 through a pipeline, and the surface of the air guide tube 19 is fixedly connected to the lower end of the surface of the infrared distance sensor 20, the left end of the bottom of the air guide tube 19 is fixedly connected to the air gun head 18, and the left end of the surface of the working bracket 9 is fixedly installed with a A filter box 7, the surface of the inner cavity of the filter box 7 is fixedly connected with a secondary filter screen 21, a primary filter screen 22 and a partition plate 23 from left to right in sequence, a blower 8 is fixedly connected to the bottom of the filter box 7, and the output end of the blower 8 is fixedly connected to the upper end of the left side of the protective shell 6 through a pipeline, a central processing unit 2 is fixedly installed on the right end of the surface of the working bracket 9, and a display screen 1 is provided on the front surface of the central processing unit 2, a limit stand 13 is fixedly connected to the middle end of the top of the working cabinet 14, a pressure sensor 12 is fixedly connected to the top of the limit stand 13, and a detected circuit board 11 is provided at the bottom of the pressure sensor 12, and the electric telescopic rod 5 is controlled by the PLC controller 16 to move downward, and the electric telescopic rod 5 moves downward while driving the fixed plate 26, the spring 24, and the movable plate 26. The telescopic rod 25, the arc-shaped rubber pressure plate 17 and the protective shell 6 move downward, so that the arc-shaped rubber pressure plate 17 contacts the circuit board 11 to be detected. Under the continuous movement of the electric telescopic rod 5, the fixing plate 26 squeezes the spring 24. When the spring 24 is squeezed and elastically deformed, a reaction force is applied to the arc-shaped rubber pressure plate 17. Under this force, the arc-shaped rubber pressure plate 17 can fix the circuit board 11 to be detected. Through the setting of the pressure sensor 12, the pressure value of the circuit board 11 to be detected can be detected. When the protective shell 6 contacts the circuit board 11 to be detected, the downward pressure generated reaches the range value preset by the pressure sensor 12, and the pressure sensor 12 transmits the information to the central processor 2.After receiving the information, the central processor 2 transmits a signal to the PLC controller 16. After receiving the signal, the PLC controller 16 controls the electric telescopic rod 5 to stop working, and controls the air pump 4, the blower 8 and the infrared distance sensor 20 to work. After the air pump 4 works to drive the external airflow to flow to the air gun head 18 through the pipeline, the position of the blind hole on the circuit board 11 to be detected is blown. Under the blowing of the wind, the residue on the surface of the blind hole is lifted up, and the air carrying the residue inside the protective shell 6 is driven by the blower 8 to flow to the filter box 7 through the pipeline. The setting of the first-level filter 22 and the second-level filter 21 inside the filter box 7 can filter the airflow delivered by the blower 8. Filter to prevent dust and residue from spreading to the outside and causing secondary pollution. The infrared distance sensor 20 can measure the distance between the infrared distance sensor 20 and the bottom of the blind hole, and then the infrared distance sensor 20 uploads the data to the central processor 2. After the central processor 2 analyzes the data, it uploads the information to the display screen 1 for display. Under the overall coordination, the depth of the blind hole on the detected circuit board 11 is detected and the dust removal effect is achieved, which greatly improves the accuracy of the data and solves the problem that the detection instrument does not have the function of cleaning the dust on the detected circuit board, which will have a great impact on the detection data obtained by the detection instrument and reduce the accuracy of the detection data.

[0019] All components in the present invention are universal standard parts or components known to technical personnel in this field, and their structures and principles can be known to technical personnel in this field through technical manuals or through conventional experimental methods. At the same time, standard parts used in this application document can be purchased from the market. Each component in this application document can be customized according to the description in the specification and drawings. The specific connection method of each part adopts conventional means such as mature bolts, rivets, welding, etc. in the prior art. Machinery, parts and equipment all adopt conventional models in the prior art. The control method is automatic control through a controller. The control circuit of the controller can be realized by simple programming by technical personnel in this field, which belongs to the common knowledge in this field. In addition, this application document is mainly used to protect mechanical devices, so this application document no longer explains the control method and circuit connection in detail, and no specific description is made here.

[0020] During use, the electric telescopic rod 5 is controlled by the PLC controller 16 to move downward. When the electric telescopic rod 5 moves downward, it drives the fixed plate 26, the spring 24, the movable telescopic rod 25, the arc-shaped rubber pressure plate 17 and the protective shell 6 to move downward, so that the arc-shaped rubber pressure plate 17 contacts the circuit board 11 to be detected. Under the continuous movement of the electric telescopic rod 5, the fixed plate 26 squeezes the spring 24. When the spring 24 is squeezed and elastically deformed, a reaction force is applied to the arc-shaped rubber pressure plate 17. Under this force, the arc-shaped rubber pressure plate 17 achieves the effect of fixing the circuit board 11 to be detected. Through the setting of the pressure sensor 12, the pressure value of the circuit board 11 to be detected can be detected. When the protective shell 6 contacts the circuit board 11 to be detected, the downward pressure generated reaches the range value preset by the pressure sensor 12, and the pressure sensor 12 transmits the information to the central processor 2. After receiving the information, the central processor 2 transmits a signal to the PLC controller 16. After receiving the signal, the PLC controller 16 controls the electric When the telescopic rod 5 stops working, the air pump 4, the blower 8 and the infrared distance sensor 20 are controlled to work. After the air pump 4 drives the external air flow to flow to the air gun head 18 through the pipeline, the position of the blind hole on the detected circuit board 11 is blown. Under the blowing of the wind, the residue on the surface of the blind hole is lifted up. The air carrying the residue inside the protective shell 6 is driven by the blower 8 to flow to the filter box 7 through the pipeline. The first-level filter 22 and the second-level filter 21 inside the filter box 7 can filter the air flow delivered by the blower 8 to prevent dust and residue from spreading to the outside and causing secondary pollution. The infrared distance sensor 20 can measure the distance between the infrared distance sensor 20 and the bottom of the blind hole, and then the infrared distance sensor 20 uploads the data to the central processor 2. After the central processor 2 analyzes the data, it uploads the information to the display screen 1 for display. Under the overall coordination, the depth of the blind hole on the detected circuit board 11 is detected and the dust removal effect is achieved, which greatly improves the accuracy of the data.

[0021] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A printed circuit board high-density blind hole detection device, comprising a working cabinet (14), characterized in that: The top of the work cabinet (14) is fixedly connected to a work bracket (9), the middle end of the work bracket (9) is fixedly connected to an electric telescopic rod (5), the bottom of the electric telescopic rod (5) is fixedly connected to a fixed plate (26), both ends of the bottom of the fixed plate (26) are fixedly connected to movable telescopic rods (25), the bottom of the movable telescopic rod (25) is fixedly connected to an arc-shaped rubber pressure plate (17), the top of the arc-shaped rubber pressure plate (17) is fixedly connected to a spring (24), and the other side of the spring (24) is fixedly connected to the bottom of the fixed plate (26), and the fixed The middle end of the bottom of the plate (26) is fixedly connected to a protective shell (6), the middle end of the top of the inner cavity of the protective shell (6) is fixedly installed with an infrared distance sensor (20), the right end of the top of the fixed plate (26) is fixedly installed with an air pump (4) through a bracket, the input end of the air pump (4) is fixedly connected to a dust filter (3), the material of the dust filter (3) includes activated carbon, the output end of the air pump (4) is fixedly connected to an air guide pipe (19) through a pipeline, and the surface of the air guide pipe (19) is fixedly connected to the lower end of the surface of the infrared distance sensor (20), and the air guide pipe (19) is fixedly connected to the infrared distance sensor (20). The left end of the bottom of the tube (19) is fixedly connected to an air gun head (18), the left end of the surface of the working bracket (9) is fixedly mounted with a filter box (7), the surface of the inner cavity of the filter box (7) is fixedly connected with a secondary filter screen (21), a primary filter screen (22) and a partition (23) in sequence from left to right, the bottom of the filter box (7) is fixedly connected to a blower (8), and the output end of the blower (8) is fixedly connected to the upper end of the left side of the protective shell (6) through a pipeline, and the right end of the surface of the working bracket (9) is fixedly mounted with a central processing unit (2), and the positive end of the central processing unit (2) is fixedly mounted to the central processing unit (2). A display screen (1) is arranged on the surface; a limit pedestal (13) is fixedly connected to the middle end of the top of the work cabinet (14); a pressure sensor (12) is fixedly connected to the top of the limit pedestal (13); support blocks (10) are fixedly connected to the four sides of the bottom of the work cabinet (14); and the distance between two adjacent support blocks (10) is equal; a cabinet door (15) is movably connected to one side of the front surface of the work cabinet (14) via a hinge; and a handle is fixedly connected to the left end of the surface of the cabinet door (15); and a circuit board (11) to be detected is arranged at the bottom of the pressure sensor (12).

2. A printed circuit board high-density blind hole detection device according to claim 1, characterized in that: A PLC controller (16) is fixedly mounted on the right end of the top of the work cabinet (14), and control buttons are arranged on the top of the PLC controller (16).

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